Trait std::marker::StructuralPartialEq
source · pub trait StructuralPartialEq { }🔬This is a nightly-only experimental API. (
structural_match #31434)Expand description
模式匹配中使用的常量的必需 trait。
不管其类型参数是否实现了 Eq，任何派生 PartialEq 的类型都会自动实现这个 trait。
如果 const 项包含某种不实现此 trait 的类型，则该类型要么 (1.) 不实现 PartialEq (这意味着常量将不提供该比较方法 (代码生成假定可用) )，要么 (2.) 自身实现 itsPartialEq 的版本 (我们认为不符合结构相等性比较)。
在以上两种情况中的任何一种情况下，我们都拒绝在模式匹配中使用此类常量。
另请参见 结构匹配 RFC 和 issue 63438，它们促使从基于属性的设计迁移到此 trait。
Implementors§
impl StructuralPartialEq for AsciiChar
impl StructuralPartialEq for BacktraceStatus
impl StructuralPartialEq for std::cmp::Ordering
impl StructuralPartialEq for TryReserveErrorKind
impl StructuralPartialEq for VarError
impl StructuralPartialEq for std::fmt::Alignment
impl StructuralPartialEq for ErrorKind
impl StructuralPartialEq for SeekFrom
impl StructuralPartialEq for IpAddr
impl StructuralPartialEq for Ipv6MulticastScope
impl StructuralPartialEq for Shutdown
impl StructuralPartialEq for SocketAddr
impl StructuralPartialEq for FpCategory
impl StructuralPartialEq for IntErrorKind
impl StructuralPartialEq for BacktraceStyle
impl StructuralPartialEq for Which
impl StructuralPartialEq for SearchStep
impl StructuralPartialEq for std::sync::atomic::Ordering
impl StructuralPartialEq for RecvTimeoutError
impl StructuralPartialEq for TryRecvError
impl StructuralPartialEq for CpuidResult
impl StructuralPartialEq for FromBytesUntilNulError
impl StructuralPartialEq for AllocError
impl StructuralPartialEq for Layout
impl StructuralPartialEq for LayoutError
impl StructuralPartialEq for CharTryFromError
impl StructuralPartialEq for DecodeUtf16Error
impl StructuralPartialEq for ParseCharError
impl StructuralPartialEq for TryFromCharError
impl StructuralPartialEq for TryReserveError
impl StructuralPartialEq for CString
impl StructuralPartialEq for FromBytesWithNulError
impl StructuralPartialEq for FromVecWithNulError
impl StructuralPartialEq for IntoStringError
impl StructuralPartialEq for NulError
impl StructuralPartialEq for Error
impl StructuralPartialEq for FileType
impl StructuralPartialEq for Permissions
impl StructuralPartialEq for Assume
impl StructuralPartialEq for AddrParseError
impl StructuralPartialEq for Ipv4Addr
impl StructuralPartialEq for Ipv6Addr
impl StructuralPartialEq for SocketAddrV4
impl StructuralPartialEq for SocketAddrV6
impl StructuralPartialEq for NonZeroI8
impl StructuralPartialEq for NonZeroI16
impl StructuralPartialEq for NonZeroI32
impl StructuralPartialEq for NonZeroI64
impl StructuralPartialEq for NonZeroI128
impl StructuralPartialEq for NonZeroIsize
impl StructuralPartialEq for NonZeroU8
impl StructuralPartialEq for NonZeroU16
impl StructuralPartialEq for NonZeroU32
impl StructuralPartialEq for NonZeroU64
impl StructuralPartialEq for NonZeroU128
impl StructuralPartialEq for NonZeroUsize
impl StructuralPartialEq for ParseFloatError
impl StructuralPartialEq for ParseIntError
impl StructuralPartialEq for TryFromIntError
impl StructuralPartialEq for RangeFull
impl StructuralPartialEq for UCred
Available on Unix only.
impl StructuralPartialEq for InvalidHandleError
Available on Windows only.
impl StructuralPartialEq for NullHandleError
Available on Windows only.